To create a user-provided table section with an I section profile, including
those with composite flanges or tapered web depth, use the following procedure.
You may want to change the input dimensions prior to
creating user provided table sections. Select
Tools > Set Current Input Unit to do so.
This user-provided section allows you to specify a tapered I-Section with an
optional composite top flange. For I sections with a bottom steel plates, you must
create a prismatic wide
flange section. Alternatively, you may use a tapered I section
when a non-composite section is required.
On the
Specification ribbon tab, select the
User Table > User Table
Manager tool in the
Beam Profiles group.
If no User Defined Table exists, you will be prompted
to create one.
The
User Table Manager dialog opens.
Click New Table.
The New User Table dialog opens.
the Select Section Type list, select
ISECTION and then click
OK.
The dialog closes and the Table Data
list in the User Table Manager dialog now has
at least one entry.
Required: Enter the following wide flange section parameters:
TWW
Thickness of web
TFF
Thickness of top flange
BFF
Width of top flange
TFF1
Thickness of bottom flange
BFF1
Width of bottom flange
Depth at Start Node
The overall depth of the section at the starting node.
Depth at End Node
The overall depth of the section at the ending node.
Note: This must be less than or equal to the depth at the start node (i.e., the section depth must taper down from start to end nodes or remain constant depth).
Optional: To specify a composite top flange:
Check the Additional Composite Flange option.
The Additional Composite Flange Specifications become active.
Specify the following values:
B(left)
Width of the composite slab to the left of the web center line
B(right)
Thickness of the composite slab
Thickness
Width of the composite slab to the right of the web center line
Modular Ratio
Modular ratio of the concrete in the composite slab with respect to the steel section material
Optional: Specify the section properties Torsional Constant (Ix),
Shear Area in Y (Ay), and Shear Area in Z
(Az):
To…
Do the following…
specify section properties directly
type positive values in these fields
specify factors to use for calculated properties
type negative values for the factors in each field
use calculated properties
leave each field as zero (0)
The remaining section properties are calculated at finite points
along the section for use in the analysis.
Click OK.
Optional: Repeat steps 4 through 9 to add more I sections.
Tip: The I sections
in the same user table can have different options for composite flanges or
section depths.
Click Close.
The section can now be added for use in the
dialog by selecting it in the
User Property Table dialog.